NCHRP 8-66 Urban Infill Research Study

1.
Introductory Questions

This survey is part of a National Cooperative Highway Research Program (NCHRP) study to develop guidance and a methodology for the preparation and review of transportation impact analyses (TIAs) of infill development in urban or urbanizing areas. Higher density, mixed-use redevelopment and infill development is an increasingly common form of development subject to environmental review and often traffic impact studies. However, there is a lack of standardized guidance and trip and parking generation data for preparing these studies.

The first phase of this study involves collecting information on current infill development definitions, infill traffic and parking generation data and estimation methods, TIA analysis methods and agency review procedures. To collect this information, we are asking members of professional organizations involved in various aspects of infill development to participate in a brief survey.

Your responses are completely confidential and will be used to identify valuable information and resources regarding the current state-of-the-practice of analyzing the impacts of infill development. Thank you for your time.

1.
What is your definition, or your organization's definition, of infill development (i.e., redevelopment, new development within a "built out" area, development in proximity to transit, etc.)?

2.
What is the source of this definition of infill development(i.e., personal perspective, organization policy or city ordinance, Urban Land Institute, etc.)?

5.
If you prepare traffic impact studies, and you claim trip generation or parking reductions for infill development, what is the basis or method of estimating the reduction?

6.
Is the basis or method of your trip generation or parking reduction one of the following? (check all that apply)

A published procedure for estimating or computing the reduction

A published table of percent reductions

Reduction negotiated with reviewing agency

Unpublished source of reduction

Other (please specify)

7.
Please identify any agency(ies) you know of that has/have guidelines for preparing traffic impact studies that stipulate a specific or required source of trip generation rates for infill development, or trip or parking generation reductions:

8.
Do the guidelines referenced in Question 7 allow adjustments to trip and parking generation rates for: (check all that apply)

Trip Generation

Parking Generation

Parking ratios

Infill development

Infill development Trip Generation

Infill development Parking Generation

Infill development Parking ratios

Proximity to transit

Proximity to transit Trip Generation

Proximity to transit Parking Generation

Proximity to transit Parking ratios

Mixed-use development (internal capture)

Mixed-use development (internal capture) Trip Generation

Mixed-use development (internal capture) Parking Generation

Mixed-use development (internal capture) Parking ratios

Transportation Demand Management (TDM) measures

Transportation Demand Management (TDM) measures Trip Generation

Transportation Demand Management (TDM) measures Parking Generation

Transportation Demand Management (TDM) measures Parking ratios

Transit-Oriented Development (TOD)

Transit-Oriented Development (TOD) Trip Generation

Transit-Oriented Development (TOD) Parking Generation

Transit-Oriented Development (TOD) Parking ratios

Area type (specify land use and area types in text box below)

Area type (specify land use and area types in text box below) Trip Generation

Area type (specify land use and area types in text box below) Parking Generation

Area type (specify land use and area types in text box below) Parking ratios

Other (specify)

Other (specify) Trip Generation

Other (specify) Parking Generation

Other (specify) Parking ratios

If you answered "Area type" and/or "Other", please explain:

9.
Are you aware of any empirical trip or parking generation survey data for infill developments? For example, surveys, counts or trip generation studies of existing infill development. If so, please identify source(s):